Automobile-tire.



E. L MITCHELL.

AUTOMOBILE ms APPLICATION FILED SEPT- 0 1912- 3,.149,4:59. Patented Aug. 10, 1915.

UNITED STATES mum OFFICE.

mwi m. MITCHELL, or nnooimizu, NEW YORK.

I To all iuliont it may concern..-

Be it known that I, EDWA D J. MrTgHELL, acitizen of the United States, residingat Brooklyn, inthe county of Kings and State of New York, haveinvented new and use ful Improvements in Automobile-Tires, of which the following is a specification.

The general object of the invention is to refine, simplify and increase the effectiveness of the locking parts of'se'ctional rubber ti res. And to this end the invention consists in providing a tongue andgroove connection for the adjacent ends of the tire sections. 7 Other objects will appear and be better understood from that embodiment of my invention-of which the following is 'a specification, reference-being had to the (\CCOIII'. pan'ying drawings forming part hereof, and in which: r I

Figure 1 is a perspective-0f a fillet or tire sectionconstructed in accordance with my invention. Fig. is a side elevation showing a fragment. of a wheel wit-h my improved' tire applied thereto. Fig. 3 is a bottom plan of Fig. 1. Fig. 4 is a vertical longitudinal section. Fig. 5 is a vertical cross section on the line 5-5 of Fig. 2.- r Y The wl1eel,-which is designated generally by ((4') has a demountable rim 5 of ordinary or preferredconstruction. The sections (6) may be of any. material found suitable. for the purpose, -as rubber and if so desired, they may have-longitudinal bores 7 to .increase their resiliency. The sections may, if so desired, be substantially cylindrical in cross section so; as to provide a round tread surface or the sections may be in any other cross sectional contour according to the "shape of'tread surface desired; By preference' the ends 8' 8 of the sections are parallel and each section is formed on one end with a dovetailed rib or stud 9, and on its opposite. end, with a dovetailed groove or socket 10 which opens through the bottom of the section and through the end wall. By constructing the said sections as Just described imd 'arran ing thein in the rim '5 so that the groove 0 'eachsection will receivethe rib of the adjacent section, each' of the..

5 0 evg n-seca nswiu be locked against-inde- Specification of Letters Patent. Patented Aug; 10, 1915, Application filed September 1:0,1912. Serial No. 719,598.

' pendent endwise movement and consequent :the usual the shoe is employed to cover the sections and this shoe is interlocked with the ;rim in the ordinary manner. The several sections are assembled'by arranging one section on the rim'andintroducingthe grooved end of a second section to. the ribbed end of the first section, the subsequent sections are similarly connected; and when thegrooved end of the last section is connectedQthe grooved end of the first section is sprung upwardly so as to admit of properly positioning the ribbed end of the'last section,

and this done, the sprung end isreleased and descends into the'rib.

"Vith the tire constructed in accordance with this invention, any of the sections thereof showing wear, may be readily removed and new sections substituted,'thus making it, unnecessaryto discard the entire tire.

In combination-with a wheel-rim,a tire comprising-sections. of resilient material having ends which are n'ormally parallel,

said sections being rounded transversely at their outer sides and being normally flat at their inner sides, said sections-having'longi tudinal boreslocated at thei-r'central portions, the passageways through which are unobstructed fromend-to end of the sections, each-section having at one end a wedge-shaped stud one side of which is in wedge-shapedsocket which opens at one side of the flat side of the section and which flat sides of the sections bearing against the the same planeea's the flatside of 'the-sectlon, each sectionhaving' at its other end a wheel rim, wherebyth studs are held by the rim in the socket an'd the sections are joined together at their innermost portions only and the portions of the sectionshaving the :bores are 'spacedfrom each other, and a cover i'nclosing the' Sections and connected 1 e at its edges with the wheel rimand bridging the spaces. between the sections and therebyiconfining a'plenum, of airbetween I the sections and; in the bores thereof, the In testimony whereof I affix my signature parts being so arrzi-Iigegl that when the time in PIIQSGII CQ Of two Witnesses.

is compressedat one point the air within ED\VARD J. MITCHELL.

the cover is maintained at the same degree Witnesses: 5 of pressure at the opposite ends of allof the. Join: A. MQRGAX,

sections.x i v G110; T. BYRNE; 

